| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Synthesis and Electrochemical Lithium Storage Properties of Multicomponent Ni/NiO/rGO Nanocomposites |
| YANG Wenfei1, ZHANG Zhongyuan1, ZHANG Xue1, WANG Yinong1, GUO Xian'e2, DONG Xinglong1,*
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1 Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
2 School of Computer and Network Engineering, Shanxi Datong University, Datong 037009, Shanxi, China |
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Abstract Nickel oxide is considered as a potential anode material for lithium-ion batteries (LIBs) due to the merits, such as high theoretical capacity (718 mAh·g-1), high density, good safety and environmental friendly. Unfortunately, the application in the field of energy storage is dramatically limited due to its low electrical conductivity and inherent volume variation. In response to the above problems, nickel nanoparticles were prepared by DC(Direct Current) arc discharge plasma method, those were further oxidized and sintered in air to obtain one-dimensional (1D) Ni/NiO nanochains. The as-prepared Ni/NiO nanochains were then uniformly mixed with graphene oxide (GO) in ethanol solution to synthesize Ni/NiO/rGO nanocomposites (NCs) through a spray drying and calcining process. 1D Ni/NiO nanochains are uniformly loaded onto the 2D rGO sheets, the mass fractions of Ni, NiO and rGO phases are of 2.15%, 87.83% and 10.02%, respectively. The 1D structure of Ni/NiO nanochains can effectively alleviate the volume expansion of active NiO phase during cycling. Meanwhile, the metallic Ni nanoparticles and rGO provide favorable conditions for electron transport, thus raising electrical conductivity of the Ni/NiO/rGO NCs. The Ni/NiO/rGO NCs electrode delivers a superior capacity of 1 016.8 mAh·g-1 at a current density of 100 mA·g-1 after 100 cycles. The reconstruction in structure and the performance optimization of NiO-based nanomaterial provide the possibility for the diversity of anode materials for LIBs.
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Published:
Online: 2022-12-09
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| Fund:National Natural Science Foundation Joint Key Project of China(U1908220). |
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2022, Vol. 36 
